Skiving machine



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SKIVING MACHINE original Filed June 27, 1955 2 sheets-sheet 1 May 26, 1936. H, A. DAVIS 2,041,700

SKIVING MACHINE 'ori inal Filed June 1955 2 sheets-sheet 2 *Eiga I 67:3

Patented May 26, 1936 i SKIVING MACHINE Hiotte A. Davis, Lynchburg, Va., assgnor to United Shoe Machinery Corporation, Paterson, N. .I., a corporation of New Jersey Application June 27, 1933, Serial No. 677,883 Renewed August 13, 1935 6 Claims. (Cl. 69-16) This invention relates to skiving machines and The illustrated machine is similar in many reis herein illustrated as embodied in a machine spects to the machine disclosed in United States of the well-known Amazeen type for skiving the Letters VPatent No. 1,866,918, granted June 12, edges of pieces of upper leather. 1932, upon an application filed in the name of VIn the manufacture of certain kinds of shoes it Milton I-I. Ballard. The present machine, like 5 is desired tol produce on a single part of an that of the patent, comprises a rotary disk knife upper tWo `or more scarfs which are different in 9, a rotary feed roll Il, and a rotary feed disk I3. width or in character, or in both. For example, The knife is adjustable substantially vertically it may be necessary to provide along the top and toward and from the feed roll. The feed disk 10 front of ,a quarter Aa shoulder or fold scarf, to presses a portion of the Work against a reduced l0 produce along the bottom a feather edge or u nend of the feed roll and aids in feeding the work.

derlap scarf and to produce along the back a seam The feed -roll shaft is rotatable in a block I5 which scarf. In such and similar cases, it is desirable is adjustable substantially horizontally in a supthat the operator be able instantly to change the port H, said support being angularly adjustable relative positions .of the work-engaging parts of in a curved guideway the center of curvature of the machine soasto avoid delay in producing first which lies in a horizontal axis indicated at :I:

one kind of scarf and then another, said workwhich passes through an element on the upper engaging parts commonly comprising a knife, a surface of the feed roll. It -Will be noted, howfeed roll, a presser and an edge guide. ever, that by adjusting the block l5 to the right To this end, in accordance with one feature of or left, the position of the point a: on the periph- 20 the invention, the edge guide is adjustable across ery of the feed roll may be changed. The block the periphery of an ang-ularly adjustable feed I5 carries a superstructure by which the feed roll and is yieldingly held at one limit of its path disk is carried so that angular adjustment of the of adjustment, operator-controlled means being feed roll support l1 about the axis :n adjusts the provided for instantly moving it to another posifeed disk. The feed disk and feed roll thus 25 tion, In the illustrated machine, the feed roll preserve atall times their relative positions. The is mounted upon a carrier which maybe angucurved guideway in which the feed roll support larly adjusted by -means of a treadle, .the edge is adjusted is located at the outer end of a large guide is slidably mounted on the feed roll carrier arm I9, said arm being angularly adjustable in so as to be angularly adjustable with it, and a a horizontal path about the axis of a Vertical 30 second treadle connected to the -edge guide prostud 2l to adjust the feed roll toward and from vides means for adjusting the guide across the lpethe knife; and the feed roll shaft is connected rphery of the roll. With such a construction, by a telescoping shaft 23 and universal joints the relative positions of the work-engaging parts with a driving pulley 25. The feed roll support A may be changed instantly in various Ways by I-1 is connected by a link 21 with a treadle con- 35' manipulating .one or both treadles to produce a trolled arm 29 pivoted at 3| and carrying a small variety of scarfs one a-fter another inany desired block 33. Two small adjusting nuts 35, threaded order. on a small rod 31, limit the rocking movement of This and `other features `of the invention inthe arm 29 and hence the extent of angular adcluding certain details of ,construction and combijustment-of the feed roll support I1. The arm 29 40 nations of parts will Vbe described as embodied is connected by a link `3l) and a pivot 32 with in an illustrated machine and pointed out in the the upperend of a treadle rod 39 in such manner appended claims. that vertical movement of the rod swings the arm Referring now tothe accompanying drawings to Ythe right `or the'left. The lower end of the Fig. 1 isa front elevati-on of amachineinwhich rod is connected to a treadle 4| normally held 45 the Vpresent invention Iis embodied, with its toe portion up by a spring 40 to` hold the Fig. 2 is a horizontal 4section on lthe line II-II feed roll Il in its up position in which the upperof Figs. 1 and 3; most element of .its periphery is parallel to the Fig. 3 is -a Avertical section on the line III- III plane of the knife 9 or substantially so. An edge of Fig. 4; guide 43 which is carried indirectly by the block 50 Fig. 4 is a yvertical section on the line IV--IV I5 has a stem 45 which carries a yieldinglyof Fig. 2; mounted adjustable presser 46. The machine, as Figs. 5 to 92L show certain .parts of the mathus far described, is or may be substantially .the chine in vdifferent positions of `adjustment .and same as the patented machine and will not be certain kinds of scarfs which are produced, described further in detail. It will be noted, 55

however, that the work to be skived is fed away from the observer, as viewed in Fig. 1, with its edge against the guide 43 and its margin beneath the presser, to the rotary knife 9. With the parts in their normal position, as shown in Fig. 1, a shoulder or fold scarf (to be described later) will be produced; and when the treadle is depressed to swing the roll down in a counterclockwise direction until the small block 33 encounters the right hand stop 35, a feather edge scarf will be produced, the positions in which the two limiting stops 35 are held thus determining the characteristics of the two scarfs.

The edge guide and presser, except for a means for quickly adjusting them in a path parallel tol the axis of the roll shaft, are or may be substantially like the guide and presser disclosed in United States Letters Patent No. 1,829,792, granted November 3, 1931, to Newell V. Dyer. The presser 46 (Fig. 4) is fast to the outer end of a three-part spring 41 of elongated U-shape, the ends of which are fastened by a screw 49 and spacers 5| to the stem 45 of the edge guide. A thumb screw 53 may be turned to raise and lower the presser, and a thumb nut 55 may be turned to vary the force which the presser exerts upon the work.

In the present construction the guide and presser, instead of being adjustable horizontally by hand and held fast in adjusted position, may be moved instantly from one horizontal position to another by a treadle, adjustable stops being provided for limiting the extent of this movement. The stem 45 of the guide 43 is slidably mounted in a bracket 51 (Figs. 1, 2 and 3) having a horizontal portion 51 (Figs. 2, 3 and 4). The upright portion of the bracket 51 (Fig. l) has slots 59 to receive screws 6| the stems of which pass through l these slots and are threaded into a block 63 which,

-like the corresponding block of the machine of Patent No. 1,866,918, is angularly adjustable and may be locked in adjusted position. Referring now more particularly to Figs. 2, 3 and 5, the stem 45 of the guide 43 isV wider at its rear end (the right-hand end as viewed in Figs. 2 and 4) and this widened portion rests upon the horizontal portionl 51 of the bracket 51. One edge of this widened portion (the left-hand edge as shown in Fig. 3) is shaped to project into a guideway having an `overhanging wall which is formed on the bracket 51. The opposite edge is beveled at an abrupt angle, and the upper corner of this bevel is engaged by the beveled edge of a hardened plate 65 which is fastened by screws 61 to the upright portion of the bracket 51. The widened portion of the stem 45 is thus held in place and guided in its sliding movement. In order further to guide the stem 45, a guide-block 69 (Fig. 3) is located in an opening in the upright portion ofthe bracket 51, said guide-block having a face which is slightly undercutto t against the abruptly beveled edge of the stem 45 and being fastened to the horizontal portion 51 of the bracket 51 by a screw 1 I, there being a small space between the block 69 and the end of the horizontal portion 51 so that any wear on the surface of the block and the stem may be taken up by tightening the screw.

It is desirable, for reasons presently to be stated, that means be provided for predetermining the limits of sliding movement of the guide and presser. To this end a U-shaped member 13 is fastened by screws 15 to the under side of the horizontal portion 51' of the bracket 51; and

. through the upwardly extending arms of this U- shaped member are threaded respectively stop screws 11, 19 held respectively in adjusted position by check nuts 8|, 83. The stop screws lie in the path of movement of the widened portion of the stem 45 of the edge guide and provide means for arresting the sliding movement of the guide and presser in both directions.

In order tohold the stem of the guide normally against the stop screw 11 and to provide means for quickly moving the stem to the left (Fig. 4) Vtoward or into contact with the stop screw 19, a 1. sheet metal bracket (Figs. 2, 3) is fastened along one edge of the stem 45 by the same screw" 49 which fastens theends of the arms 41 of the`v horizontally disposed U-shaped spring which carries the presser 46, the outer edge of the sheet metal bracket having a recess to receive the upper end of a shifting lever 81 which is pivoted to the frame of the machine about the stem of a screw 89 (Fig. 2). Referring to Fig. 1, the lower end of this lever 81 passes through a slot in the 2 top 9| of the bench upon which the machine is mounted and is urged continually to the left by a tension spring 93 so as to hold the widened portion of the stem 45 of the edge guide against the stop screw 11, the guide and presser being then in their normal retracted positions. A treadle 95 provides means for swinging the lower end of the lever 81 to the right to move the guide and presser to the left until the widened portion of the stem 45 of the edge guide contacts with the stop screw 19. This treadle is connected by a treadle rod 96 with an arm 91 the hub of which is fast to a rock-shaft 99. Also fast to this rockshaft is the hub of a second arm |ll| the outer end of which is connected by a link |03 with the lower end of the shifting lever 81. With this construction, the feed roll the guide 43 and the presser 46 normally occupy the positions shown in Fig. 1. The treadle 4| may be depressed at any time to tilt the feed roll whereupon the 4 guide and presser tilt with it; and the treadle 94 may be depressed at any time to slide the guide and presser to the left.

The purpose of this construction, as has been indicated above, is to provide for instantly ad- 4 justing these parts of the machine so that the operator may change rapidly from one kind of scarf to another. Referring now more particularly to Figs. 7 to 9a, some of the ways in which different scarfs may be produced will be de- 5 scribed. In Fig. 7, the parts are in the same position as they are shown in Fig. 1, the feed roll being in its normal uppermost angular position and in its longitudinal position in which the axis about which it may be tilted passes through the 5 point a: on the upper element of the roll, the guide 43 and the presser 46 being in their normal horidontal position with respect to the feed roll with the widened portion of the stem 45 held against the right end stop screw 11. With the machine 6 so adjusted, in which position of adjustment the upper element of the feed roll is parallel to the plane of the knife or substantially so and the work-engaging face of the edge guide is substantially in line with the right-hand face of the roll, 6V

the shoulder or fold scarf of Fig. '7a will be produced. If now it is desired to produce a feather edge scarf shown in Fig. 8a, the treadle 4| is depressed to tilt the roll about the axis a: into the position shown in Fig. 8 and also in Fig. 5. It should be here noted that the fold scarf of Fig. '7a and the feather edge scarf of Fig. 8E are of substantially the same width. If now it is desired to produce the blunt edge seam scarf of Fig. 9a, the treadle 95 is depressed to slide the guide 7 43 and the presser 4E to the left until the lefthand stop screw 19 stops such movement, whereupon the parts will be in the positions shown in Fig. 9 and also in Fig. 6. It may be noted that the seam scarf of Fig. 9a is like the feather edge scarf of Fig. 8a, except that its extreme end has been cut off.

It may sometimes be desired to produce a fold scarf which is narrower than the feather edge scarf. In such case the feed roll is held in its normal uppermost position, as shown in Fig. '7, and the guide and presser are moved to the left into the positions which they occupy in Fig. 9, so that the edge guide is over the periphery of the roll and spaced from the right-hand end thereof. Ii then it is desired to produce the feather edge scarf of Fig. 8a, the feed roll i l is tilted, and the guide and presser allowed to resume their right-hand positions, all as shown in Fig. 8. Without going into further detailed explanation of what adjustments may be made, it will be evident that the machinemay be instantly adjusted by means of the treadles to produce different kinds of scarfs in any desired order and that scarfs which differ from those illustrated will result if the feed roll Il is adjusted longitudinally into another position to change the location cf the point :c with respect to the roll.

Although the invention has been set forth as embodied in a particular machine, it will be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A skiving machine having, in combination, a knife, an angularly adjustable feed roll, an edge guide, a presser, said edge guide and presser being adjustable across the work-supporting surface of the feed roll, stops for limiting the extent of this movement of adjustment, yielding means for normally holding the guide and presser in a position determined by one of the stops, and operator-controlled means for moving them instantly into a position determined by the other stop.

2. A skiving machine having, in combination, a knife, an angularly adjustable feed roll, an edge guide, a presser, said edge guide being adjustable across the work-supporting surface of the feed roll, adjustable stops for limiting the extent of the movement of adjustment, yielding means for normally holding the guide in a position determined by one of the stops, and operatorcontrolled means for moving it instantly into a position determined by the other stop.

3. A skiving machine having, in combination,

a rotary knife, a feed roll, a support for the roll angularly adjustable to vary the inclination of the scarf produced, a presser for holding the work against the roll, a guide for engaging the edge of the work, a carrier for said presser and guide slidably mounted upon the feed roll support, yielding means for holding the carrier at one limit of its path of sliding movement, and operator-controlled means for adjusting the feed roll support angularly and for moving the carrier instantly into selected positions relative .to the roll irrespective of the angular position of the feed roll support.

4. A skiving machine having, in combination, a knife, an edge guide, a presser, a feed roll, said guide and presser being mounted for adjustment across the periphery of the feed roll to vary the width of the scarf produced, yielding means tending at all times to move the guide and presser into and to hold it in a predetermined position at one limit of its path of movement, said feed roll being angularly adjustable to vary the character of the scarf, and two operator-controlled means manipulation of one of which tilts the feed roll, and manipulation of the other of which adjusts the presser and guide instantly to the other linut of its path of movement.

5. A skiving machine having, in combination, a rotary disk knife, an angularly adjustable feed roll, a presser and an edge guide angularly adjustable with the roll and slidably adjustable along the periphery of the roll whereby, with the roll in an angular position in which the upper element of its periphery is parallel or substantially so to the plane of the cut of the knife and the edge guide is above the periphery of the roll and spaced from the end thereof, a comparatively narrow fold scarf will be produced, whereas with said upper element at a considerable angle to the plane of the cut of the knife and with the work engaging-face of the edge guide in substantial alinement with one end of the roll, a wider feather edge scarf will be produced, and operator-controlled means capable of instant manipulation to adjust the parts of the machine into either of these two positions.

6. A skiving machine having in combination, a knife and a feed roll mounted for relative angular adjustment to vary the inclination of the scarf produced, a presser and edge guide mounted for adjustment across the periphery of the feed roll to vary the width of the scarf produced, and two operator-controlled means manipulation of one of which instantly causes relative angular adjustment between the knife and roll and manipulation of the otherof which instantly adjusts the presser and guide.

HIOTTE A. DAVIS. 

